<template>
  <div>
    <div v-for="(item, index) in arr" :key="index">
      <input v-model="chosen" :value="item" type="checkbox" />{{ item }}
    </div>
    <p>你选中的元素的累加值为；{{ totalFn }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      chosen: [],
    }
  },
  methods: {},
  computed: {
    totalFn() {
      return this.chosen.reduce((sum, item) => {
        return (sum += item)
      }, 0)
    },
  },
}
</script>

<style></style>
